adjective

involving many carefully arranged parts or details; detailed and complicated in design and planning.

elaborate security precautions

complicated,detailed,intricate,complex,involved,tortuous,convoluted,serpentine,tangled,knotty,confusing,bewildering,baffling,painstaking,careful,inextricable,entangled,impenetrable,Byzantine,Daedalian,Gordian,involute,involuted,ornate,decorated,embellished,adorned,ornamented,fancy,over-elaborate,fussy,busy,ostentatious,extravagant,showy,baroque,rococo,florid,wedding-cake,gingerbread,flash,flashy

verb

develop or present (a theory, policy, or system) in further detail.

the theory was proposed by Cope and elaborated by Osborn